A Not-So-Dirty Secret

摘要

Emergency vehicles aren't like highway trucks, buses or passenger cars. They don't have the same kind of daily use, their runs are shorter in distance and the diesel engines that propel them may never reach peak operating temperatures - or at least not for extended periods of time. As a result, the after-treatment system on vehicles built after 2007 may not always get hot enough to regenerate (clean itself) automatically. That's why every vehicle manufacturer has included a series of lamps on the dashboard to alert the operator when regeneration is needed, along with an easy way to initiate the process while the vehicle is parked.